android 动态设置获取控件大小，并设置宽度等于高度，或者高度等于宽度。

public static void setViewWidthByHeight(View view) {
final View mv = view;
final ViewTreeObserver vto = mv.getViewTreeObserver();
final ViewTreeObserver.OnPreDrawListener preDrawListener = new ViewTreeObserver.OnPreDrawListener() {
public boolean onPreDraw() {

//				int width = mv.getMeasuredWidth();
int height = mv.getMeasuredHeight();

android.view.ViewGroup.LayoutParams lp = mv.getLayoutParams();
lp.width = height;
mv.setLayoutParams(lp);

final ViewTreeObserver vto1 = mv.getViewTreeObserver();
vto1.removeOnPreDrawListener(this);

return true;
}
};
vto.addOnPreDrawListener(preDrawListener);
}